US20070114247A1 - Bellows pump mechanism - Google Patents
Bellows pump mechanism Download PDFInfo
- Publication number
- US20070114247A1 US20070114247A1 US11/287,528 US28752805A US2007114247A1 US 20070114247 A1 US20070114247 A1 US 20070114247A1 US 28752805 A US28752805 A US 28752805A US 2007114247 A1 US2007114247 A1 US 2007114247A1
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- United States
- Prior art keywords
- bellows
- outlet
- pump
- base wall
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/02—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having bellows
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K5/00—Holders or dispensers for soap, toothpaste, or the like
- A47K5/06—Dispensers for soap
- A47K5/12—Dispensers for soap for liquid or pasty soap
- A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
- A47K5/1208—Dispensers for soap for liquid or pasty soap dispensing dosed volume by means of a flexible dispensing chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
- F04B43/0063—Special features particularities of the flexible members bell-shaped flexible members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1028—Pumps having a pumping chamber with a deformable wall
- B05B11/1032—Pumps having a pumping chamber with a deformable wall actuated without substantial movement of the nozzle in the direction of the pressure stroke
Definitions
- the present invention generally relates to pump mechanisms. More particularly, the present invention relates to pump mechanisms that are employed in dispensers, most often wall-mounted dispensers for soap and other hand-treatment products.
- Wall-mounted dispensers for fluid or flowable products are well known in the art. These generally consist of a wall-mounted cabinet with a chamber for receipt of refills containing the flowable product.
- a dispenser base is mounted on a wall or counter top and a cover is usually hinged to the dispenser base to provide access to the interior.
- the dispenser base includes various types of receptacles or shelves designed to support and position a cartridge, bag or box that contains the product to be dispensed. These cartridges, bags, boxes, etc., are replaceable so that the dispenser can be refilled when the product supply is exhausted.
- dome pumps Of particular interest in this invention are dome pumps.
- an inlet and an outlet both with appropriate valve mechanisms, communicate with a pump body, and a flexible dome extends over the body to retain the flowable product.
- the inlet valve When pressure is applied to the flexible dome causing the flexible dome to collapse, the inlet valve is closed and the outlet valve is opened, allowing product to be forced out of the outlet.
- the outlet valve closes and the inlet valve opens to allow additional product to be drawn from the product source into the interior volume of the dome.
- Examples of dome pumps can be found in U.S. Pat. Nos. 3,486,663; 3,820,689; 3,987,938; 4,168,020; 5,207,355; 5,505,341; and 6,216,916.
- the prior art contains many other variations on this general theme.
- valves in the prior art dome pumps are often spring-biased ball valves, and it will be appreciated that such valve constructs involve multiple parts and manufacturing steps.
- some in the art have begun to construct valves from the dome itself.
- the dome-type pump in U.S. Pat. Nos. 3,820,689 and 5,505,341 extend the dome to create both an inlet sealing flap that seals off the inlet port communicating with the interior of the dome and an outlet sealing flap that seals off the outlet port.
- the dome-type pump constructs that improve upon and reduce the complexity of the prior art designs by beneficially employing the dome portion (or compressible portion) as a valve.
- the flexible dome portion of the dome pumps are often constructed from silicone.
- silicone rubber is appropriately flexible and resilient, having a tendency to return to a molded shape, and tends not to swell or degrade in contact with various fluids, thus retaining its flexibility.
- Silicone rubber is also readily made translucent, which has been found to be beneficial in dispenser arts employing dome pumps, as in U.S. Pat. No. 6,216,916.
- the silicone is unduly expensive, and a need exists for pumps that need not employ silicone.
- the bellows pump includes a pump body having a base wall defined by a base wall perimeter.
- An inlet aperture is provided in the base wall, offset from the base wall perimeter, and an outlet aperture is also provided in the base wall, offset from the base wall perimeter.
- a bellows member is secured to the pump body and includes an open end defined by a sealing flange that is sealed to the base wall, with the inlet aperture and the outlet aperture being positioned within the open end.
- the bellows member further includes a sealing web extending inwardly from all points of the sealing flange to a first hinge, and a dosing web extending outwardly from the first hinge at one end thereof to a bellows cap at the other end thereof, the bellows cap creating a closed end opposite the open end.
- the sealing web, the dosing web and the bellows cap define a dose volume between the base wall of the pump body and the bellows cap, wherein pressing on the bellows cap toward the base wall collapses the bellows member such that the sealing web covers the inlet aperture but does not cover the outlet aperture, thereby expelling at least a portion of the contents of the dose volume out the outlet aperture.
- the bellows member is formed of material other than silicone. Suitable materials have been found to be thermoplastic rubbers, ethylene-propylene-diene monomers (EPDMs), polyisoprenes, butyl rubbers, low density polyethylenes, and thermoplastic polyesters. A particular useful thermoplastic polyester is HytrelTM (DuPont).
- the pump body includes an outlet fitment and an inlet fitment and a spout fits over the outlet fitment and carries a valve that is retained by a valve retaining ring.
- a bellows retaining ring engages the bellows member and the pump body to seal the sealing flange to the base wall of the pump body.
- the pump body is formed in one piece, as is the bellows member, and the pump body, the bellows member, the bellows retaining ring, the spout, the valve and the valve retaining ring create the complete bellows pump.
- the bellows member may even be formed with the bellows retaining ring as one piece.
- FIG. 1 is a side elevational view of a particularly preferred assembled bellows pump in accordance with the present invention
- FIG. 2 is a top plan view of the bellows pump of FIG. 1 ;
- FIG. 3 is an assembly view showing the various elements of the bellows pump of FIG. 1 ;
- FIG. 4 is a cross-sectional view of the bellows pump, taken along the line 4 - 4 of FIG. 1 , showing the bellows pump in a rest position;
- FIG. 5 is a cross-sectional view, as in FIG. 4 , but shown as the bellows member is being compressed to dispense product;
- FIG. 6 is a cross-sectional view, as in FIGS. 4 and 5 , but shown as the bellows member expands to draw product into the pump;
- FIG. 7 is a cross-sectional view of the bellows member only.
- Bellows pump 10 includes pump body 12 having base wall 14 defined by base wall perimeter 16 .
- Perimeter wall 17 extends upwardly from base wall 14 , at base wall perimeter 16 , and provides means for securing bellows member 30 to pump body 12 , as will be described more particularly below.
- Perimeter 16 is preferably circular, as shown.
- Inlet aperture 18 is provided in base wall 14 offset from base wall perimeter 16
- outlet aperture 20 is provided in base wall 14 and, for reasons that will be explained below, is offset from base wall perimeter 16 at a greater distance than inlet aperture 18 .
- Inlet fitment 22 provides an inlet path 24 that communicates with inlet aperture 18 .
- outlet fitment 26 provides at least a portion of an outlet path 28 communicating with outlet aperture 20 .
- inlet fitment 22 and outlet fitment 26 at substantially right angles, as shown in the figures, readily allows for the substitution of bellows pump 10 into combination bag and pump arrangements and dispensers employing the same.
- a bellows pump in accordance with this invention may be employed in bag and pump arrangements and dispensers such as those shown in U.S. Pat. No. 6,216,916.
- inlet fitment 22 may communicate with a bag that retains flowable product
- outlet fitment 26 may communicate with portions of dispensers made to employ such combination bag and pump arrangements.
- Flange 27 FIG. 2
- Bellows member 30 fits over base wall 14 and serves as the actual pump mechanism. That is, the compression and expansion of bellows member 30 results in the dispensing of a dose of product and the loading of a new dose into the internal volume of bellows member 30 .
- the internal volume is designated by the letter V and is defined between base wall 14 and bellows cap 32 . More particularly, volume V is defined by base wall 14 , sealing web 34 , dosing web 36 and bellows cap 32 .
- bellows member 30 has an open end 38 defined by a sealing flange 40 .
- Sealing flange 40 is sealed to base wall 14 by any suitable means, here by bellows retaining ring 42 , which fits within channel 43 in perimeter wall 17 of pump body 12 to squeeze sealing flange 40 tightly against base wall 14 .
- Bellows member 30 and bellows retaining ring 42 may even be formed as one piece to reduce the number of parts and aid in assembly (shown in phantom in FIG. 7 ).
- bellows retaining ring 42 forces sealing flange 40 against base wall 14 of pump body 12 is sufficient to ensure that product within bellows member 30 will not be able to exit bellows pump 10 between sealing flange 40 and base wall 14 .
- other means for securing bellows member 30 to base wall 14 or another appropriate portion of pump body 12 may be employed, as, for example, employing an appropriate adhesive. Ultrasonic welding of sealing flange 40 to base wall 14 is also acceptable.
- Sealing web 34 extends inwardly from all points of sealing flange 40 to first hinge 44 .
- Dosing web 36 extends outwardly from first hinge 44 at a first end 45 thereof and joins with bellows cap 32 at a second end 46 to create a closed end opposite open end 38 .
- bellows member 30 is sealed to base wall 14 at sealing flange 40 , bellows cap 32 , sealing web 34 , dosing web 36 and base wall 14 define a dose volume V.
- Bellows member 30 is preferably formed from a single, blow molded or injection molded piece, and, as mentioned, might be molded as one piece with bellows retaining ring 42 .
- bellows pump 10 is shown in its normal rest position, with sealing web 34 in contact with inlet aperture 18 , and with flowable product P held within dose volume V.
- Product P is also present in outlet path 28 (from a previous dispensing of product) and in inlet path 24 (from an ultimate source of product P, e.g., a bag container of a bag and pump combination).
- Inlet aperture 18 has a contact surface 19 on a slope that substantially parallels the slope of sealing web 34 so that the contact between sealing web 34 and inlet aperture 18 will be flush and therefore not easily compromised to permit the flow of product P from within dose volume V through inlet path 24 .
- Compressing bellows member 30 by pushing on bellows cap 32 in the direction of arrow A, as shown in FIG.
- sealing web 34 results in the dispensing of product P through outlet path 28 , because sealing web 34 is in contact with inlet aperture 18 and seals the same against the flow of product P from within dosage volume V. Sealing web 34 does not cover outlet aperture 20 upon compression of bellows member 30 and, thus, product P is forced through outlet aperture (i.e., dispensed) in the direction of arrow B, going through elastomeric valve 56 in a spout 50 , disclosed more particularly herein below. In the embodiment shown, sealing web 34 cannot cover all of outlet aperture 20 because it is inset from perimeter 16 at a greater distance than is inlet aperture 18 .
- expansion of bellows member 30 draws product in through inlet aperture 18 , as at arrow D.
- This is due to the resilient nature of the materials selected for forming bellows member 30 . That is, the force at which bellows member 30 expands back to its normal rest position of FIG. 4 is sufficient to pull product P into dose volume V, forcing sealing web 34 off of its normal resting position closing off inlet aperture 18 .
- valve mechanisms in a separate spout element namely spout 50 .
- spout 50 fits over outlet fitment 26 and is secured thereto particularly through the interaction of rib 52 (on outlet fitment 26 ) and channel 54 (in spout 50 ).
- elastomeric valve 56 is retained in spout 50 , at step 58 , by valve retaining ring 60 , which fits in channel 62 adjacent step 58 .
- Elastomeric valve 56 is a basic one-way valve made from elastomers. It opens to permit flow in the direction of arrow B, when sufficient pressure is applied to bellows member 30 (as in FIG. 5 ), but is normally biased to be closed and prevent flow in the direction opposite arrow B upon an expansion of bellows member 30 from a compressed state (as in FIG. 6 ).
- Pump body 12 including inlet fitment 22 and outlet fitment 26 , is preferably formed from lightweight, rigid materials. Many plastics are suitable, such as polypropylene, polyethylene, acetal or acrylonitrile butadiene styrene (ABS). Spout 50 is also preferably formed from such materials.
- ABS acrylonitrile butadiene styrene
- Bellows member 30 is preferably formed from resilient, flexible materials, particularly those capable of returning the bellows member from its compressed state to its rest state thousands of times, without seriously compromising the integrity of the bellows member.
- the entire bellows member 30 is formed from the same material to simplify manufacturing, but it is contemplated that certain portions might be formed from one material while other portions are formed from different materials.
- Silicone rubber may be employed for bellows member 30 , but is preferably avoided due to costs. Broadly, elastomeric rubbers are preferred.
- bellows member 30 is formed from materials selected from the group consisting of polyvinly chloride (PVC), thermoplastic rubbers, EPDMs, polyisoprenes, butyl rubbers, and low density polyethylenes (LDPEs) and thermoplastic polyesters.
- PVC polyvinly chloride
- EPDMs thermoplastic rubbers
- EPDMs polyisoprenes
- butyl rubbers polyisoprenes
- LDPEs low density polyethylenes
- thermoplastic polyesters thermoplastic polyesters.
- HytrelTM DuPont.
- sealing flange 40 When sealing flange 40 is to be secured by bellows retaining ring 42 , sealing flange 40 is preferably made of readily compressible elastomeric material.
- the EPDM, polyisoprene and butyl rubber materials would be suitable.
- TrefsinTM a thermoplastic rubber from Advanced Elastomer Systems, grade number 3271-65W308 is particularly useful because it is resistant to soaps.
- sealing flange 40 is ultrasonically welded to base wall 14
- low density polyethylene could be employed for sealing flange 40 and the remainder of bellows member 30 .
- EngageTM a LDPE from DuPont Dow Elastomers, ethylene-octene copolymer, is suitable, and is transparent, flexible and durable.
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Abstract
Description
- The present invention generally relates to pump mechanisms. More particularly, the present invention relates to pump mechanisms that are employed in dispensers, most often wall-mounted dispensers for soap and other hand-treatment products.
- Wall-mounted dispensers for fluid or flowable products are well known in the art. These generally consist of a wall-mounted cabinet with a chamber for receipt of refills containing the flowable product. A dispenser base is mounted on a wall or counter top and a cover is usually hinged to the dispenser base to provide access to the interior. The dispenser base includes various types of receptacles or shelves designed to support and position a cartridge, bag or box that contains the product to be dispensed. These cartridges, bags, boxes, etc., are replaceable so that the dispenser can be refilled when the product supply is exhausted.
- These cartridges or refills take various shapes and forms in the prior art. Perhaps the most common currently used are combination bag and pump arrangements that include a collapsible bag containing the flowable product, and a pump mechanism affixed to the bag and communicating with the flowable product. The bag may be retained in a box, as known. The bag or bag-and-box, as the case may be, is simply placed inside the dispenser when needed, and the flowable product is dispensed from the bag, through the pump, generally by utilization of a hand-operated lever that appropriately contacts and compresses the necessary pump mechanisms and forces the flowable material out of a nozzle of the pump.
- Of particular interest in this invention are dome pumps. In these pumps, an inlet and an outlet, both with appropriate valve mechanisms, communicate with a pump body, and a flexible dome extends over the body to retain the flowable product. When pressure is applied to the flexible dome causing the flexible dome to collapse, the inlet valve is closed and the outlet valve is opened, allowing product to be forced out of the outlet. As pressure is removed from the flexible dome, the outlet valve closes and the inlet valve opens to allow additional product to be drawn from the product source into the interior volume of the dome. Examples of dome pumps can be found in U.S. Pat. Nos. 3,486,663; 3,820,689; 3,987,938; 4,168,020; 5,207,355; 5,505,341; and 6,216,916. The prior art contains many other variations on this general theme.
- The valves in the prior art dome pumps are often spring-biased ball valves, and it will be appreciated that such valve constructs involve multiple parts and manufacturing steps. Thus, some in the art have begun to construct valves from the dome itself. For example, the dome-type pump in U.S. Pat. Nos. 3,820,689 and 5,505,341 extend the dome to create both an inlet sealing flap that seals off the inlet port communicating with the interior of the dome and an outlet sealing flap that seals off the outlet port. As these prior art references show, there is need in the art for dome-type pump constructs that improve upon and reduce the complexity of the prior art designs by beneficially employing the dome portion (or compressible portion) as a valve.
- Notably, the flexible dome portion of the dome pumps are often constructed from silicone. This is because silicone rubber is appropriately flexible and resilient, having a tendency to return to a molded shape, and tends not to swell or degrade in contact with various fluids, thus retaining its flexibility. Silicone rubber is also readily made translucent, which has been found to be beneficial in dispenser arts employing dome pumps, as in U.S. Pat. No. 6,216,916. However, the silicone is unduly expensive, and a need exists for pumps that need not employ silicone.
- Thus, there exists a need in the art for a pump that employs less expensive materials than the silicone typically employed; that is easy to manufacture, and reduces the necessary number of parts employed by employing the compressible portion thereof as a valve.
- This invention generally provides what is termed herein a “bellows pump,” because the main element that is manipulated to operate the pump (the compressible portion) includes structure similar to that of a camera bellows. The bellows pump includes a pump body having a base wall defined by a base wall perimeter. An inlet aperture is provided in the base wall, offset from the base wall perimeter, and an outlet aperture is also provided in the base wall, offset from the base wall perimeter. A bellows member is secured to the pump body and includes an open end defined by a sealing flange that is sealed to the base wall, with the inlet aperture and the outlet aperture being positioned within the open end. The bellows member further includes a sealing web extending inwardly from all points of the sealing flange to a first hinge, and a dosing web extending outwardly from the first hinge at one end thereof to a bellows cap at the other end thereof, the bellows cap creating a closed end opposite the open end. The sealing web, the dosing web and the bellows cap define a dose volume between the base wall of the pump body and the bellows cap, wherein pressing on the bellows cap toward the base wall collapses the bellows member such that the sealing web covers the inlet aperture but does not cover the outlet aperture, thereby expelling at least a portion of the contents of the dose volume out the outlet aperture.
- In particularly preferred embodiments, the bellows member is formed of material other than silicone. Suitable materials have been found to be thermoplastic rubbers, ethylene-propylene-diene monomers (EPDMs), polyisoprenes, butyl rubbers, low density polyethylenes, and thermoplastic polyesters. A particular useful thermoplastic polyester is Hytrel™ (DuPont).
- In particularly preferred embodiments, the pump body includes an outlet fitment and an inlet fitment and a spout fits over the outlet fitment and carries a valve that is retained by a valve retaining ring. A bellows retaining ring engages the bellows member and the pump body to seal the sealing flange to the base wall of the pump body. The pump body is formed in one piece, as is the bellows member, and the pump body, the bellows member, the bellows retaining ring, the spout, the valve and the valve retaining ring create the complete bellows pump. The bellows member may even be formed with the bellows retaining ring as one piece.
- For a complete understanding of the objects, techniques and structure of the invention, reference should be made to the following detailed description and accompanying drawings wherein:
-
FIG. 1 is a side elevational view of a particularly preferred assembled bellows pump in accordance with the present invention; -
FIG. 2 is a top plan view of the bellows pump ofFIG. 1 ; -
FIG. 3 is an assembly view showing the various elements of the bellows pump ofFIG. 1 ; -
FIG. 4 is a cross-sectional view of the bellows pump, taken along the line 4-4 ofFIG. 1 , showing the bellows pump in a rest position; -
FIG. 5 is a cross-sectional view, as inFIG. 4 , but shown as the bellows member is being compressed to dispense product; -
FIG. 6 is a cross-sectional view, as inFIGS. 4 and 5 , but shown as the bellows member expands to draw product into the pump; and -
FIG. 7 is a cross-sectional view of the bellows member only. - With reference to
FIGS. 1-4 , it can be seen that a bellows pump in accordance with this invention is shown and designated by thenumeral 10.Bellows pump 10 includespump body 12 havingbase wall 14 defined bybase wall perimeter 16.Perimeter wall 17 extends upwardly frombase wall 14, atbase wall perimeter 16, and provides means for securingbellows member 30 to pumpbody 12, as will be described more particularly below.Perimeter 16 is preferably circular, as shown.Inlet aperture 18 is provided inbase wall 14 offset frombase wall perimeter 16, andoutlet aperture 20 is provided inbase wall 14 and, for reasons that will be explained below, is offset frombase wall perimeter 16 at a greater distance thaninlet aperture 18.Inlet fitment 22 provides aninlet path 24 that communicates withinlet aperture 18. Similarly,outlet fitment 26 provides at least a portion of anoutlet path 28 communicating withoutlet aperture 20. - It will be appreciated that this specific construction providing
inlet fitment 22 andoutlet fitment 26, at substantially right angles, as shown in the figures, readily allows for the substitution ofbellows pump 10 into combination bag and pump arrangements and dispensers employing the same. By way of representative example, a bellows pump in accordance with this invention may be employed in bag and pump arrangements and dispensers such as those shown in U.S. Pat. No. 6,216,916. Particularly,inlet fitment 22 may communicate with a bag that retains flowable product, andoutlet fitment 26 may communicate with portions of dispensers made to employ such combination bag and pump arrangements. Flange 27 (FIG. 2 ) would communicate with a receiving member in such a dispenser, as known. Notably, the present disclosure focuses on disclosing a particular bellows pump configuration, and the incorporation of this configuration into bags and dispensers of the prior art will be readily apparent to those of ordinary skill in the art. Thus, such incorporation is not disclosed here as it would merely be repetitive of information already appreciated in the art. -
Bellows member 30 fits overbase wall 14 and serves as the actual pump mechanism. That is, the compression and expansion ofbellows member 30 results in the dispensing of a dose of product and the loading of a new dose into the internal volume ofbellows member 30. As seen inFIG. 4 , the internal volume is designated by the letter V and is defined betweenbase wall 14 and bellowscap 32. More particularly, volume V is defined bybase wall 14, sealingweb 34,dosing web 36 and bellowscap 32. - Referring now to
FIGS. 3, 4 and 7, it can be seen that bellowsmember 30 has anopen end 38 defined by a sealingflange 40. Sealingflange 40 is sealed tobase wall 14 by any suitable means, here bybellows retaining ring 42, which fits withinchannel 43 inperimeter wall 17 ofpump body 12 to squeeze sealingflange 40 tightly againstbase wall 14.Bellows member 30 andbellows retaining ring 42 may even be formed as one piece to reduce the number of parts and aid in assembly (shown in phantom inFIG. 7 ). The force at which bellows retainingring 42forces sealing flange 40 againstbase wall 14 ofpump body 12 is sufficient to ensure that product withinbellows member 30 will not be able to exit bellows pump 10 between sealingflange 40 andbase wall 14. It will be appreciated that other means for securingbellows member 30 tobase wall 14 or another appropriate portion ofpump body 12 may be employed, as, for example, employing an appropriate adhesive. Ultrasonic welding of sealingflange 40 tobase wall 14 is also acceptable. - Sealing
web 34 extends inwardly from all points of sealingflange 40 tofirst hinge 44.Dosing web 36 extends outwardly fromfirst hinge 44 at afirst end 45 thereof and joins with bellows cap 32 at asecond end 46 to create a closed end oppositeopen end 38. Thus, when bellowsmember 30 is sealed tobase wall 14 at sealingflange 40, bellowscap 32, sealingweb 34,dosing web 36 andbase wall 14 define a dose volumeV. Bellows member 30 is preferably formed from a single, blow molded or injection molded piece, and, as mentioned, might be molded as one piece withbellows retaining ring 42. - In
FIG. 4 , bellows pump 10 is shown in its normal rest position, with sealingweb 34 in contact withinlet aperture 18, and with flowable product P held within dose volume V. Product P is also present in outlet path 28 (from a previous dispensing of product) and in inlet path 24 (from an ultimate source of product P, e.g., a bag container of a bag and pump combination).Inlet aperture 18 has acontact surface 19 on a slope that substantially parallels the slope of sealingweb 34 so that the contact between sealingweb 34 andinlet aperture 18 will be flush and therefore not easily compromised to permit the flow of product P from within dose volume V throughinlet path 24. Compressing bellowsmember 30 by pushing on bellows cap 32 in the direction of arrow A, as shown inFIG. 5 , results in the dispensing of product P throughoutlet path 28, because sealingweb 34 is in contact withinlet aperture 18 and seals the same against the flow of product P from within dosage volumeV. Sealing web 34 does not coveroutlet aperture 20 upon compression ofbellows member 30 and, thus, product P is forced through outlet aperture (i.e., dispensed) in the direction of arrow B, going throughelastomeric valve 56 in aspout 50, disclosed more particularly herein below. In the embodiment shown, sealingweb 34 cannot cover all ofoutlet aperture 20 because it is inset fromperimeter 16 at a greater distance than isinlet aperture 18. - With reference to
FIG. 6 , expansion ofbellows member 30, as represented by arrow C, draws product in throughinlet aperture 18, as at arrow D. This is due to the resilient nature of the materials selected for formingbellows member 30. That is, the force at which bellowsmember 30 expands back to its normal rest position ofFIG. 4 is sufficient to pull product P into dose volume V, forcing sealingweb 34 off of its normal resting position closing offinlet aperture 18. - Although it will be appreciated that appropriate valving could be employed in
outlet fitment 26 to permit for only the dispensing of product P from dose volume V and prohibit the pulling of product P throughoutlet fitment 26 into dose volume V, the preferred embodiment of the present invention employs valve mechanisms in a separate spout element, namely spout 50. As seen inFIGS. 1-5 , spout 50 fits overoutlet fitment 26 and is secured thereto particularly through the interaction of rib 52 (on outlet fitment 26) and channel 54 (in spout 50). With reference toFIGS. 4-6 , it can be seen thatelastomeric valve 56 is retained inspout 50, atstep 58, byvalve retaining ring 60, which fits in channel 62adjacent step 58.Elastomeric valve 56 is a basic one-way valve made from elastomers. It opens to permit flow in the direction of arrow B, when sufficient pressure is applied to bellows member 30 (as inFIG. 5 ), but is normally biased to be closed and prevent flow in the direction opposite arrow B upon an expansion ofbellows member 30 from a compressed state (as inFIG. 6 ). -
Pump body 12, includinginlet fitment 22 andoutlet fitment 26, is preferably formed from lightweight, rigid materials. Many plastics are suitable, such as polypropylene, polyethylene, acetal or acrylonitrile butadiene styrene (ABS).Spout 50 is also preferably formed from such materials. -
Bellows member 30 is preferably formed from resilient, flexible materials, particularly those capable of returning the bellows member from its compressed state to its rest state thousands of times, without seriously compromising the integrity of the bellows member. Preferably, theentire bellows member 30 is formed from the same material to simplify manufacturing, but it is contemplated that certain portions might be formed from one material while other portions are formed from different materials. Silicone rubber may be employed forbellows member 30, but is preferably avoided due to costs. Broadly, elastomeric rubbers are preferred. - In some embodiments, bellows
member 30 is formed from materials selected from the group consisting of polyvinly chloride (PVC), thermoplastic rubbers, EPDMs, polyisoprenes, butyl rubbers, and low density polyethylenes (LDPEs) and thermoplastic polyesters. A particular useful thermoplastic polyester is Hytrel™ (DuPont). - When sealing
flange 40 is to be secured bybellows retaining ring 42, sealingflange 40 is preferably made of readily compressible elastomeric material. The EPDM, polyisoprene and butyl rubber materials would be suitable. Trefsin™ (a thermoplastic rubber from Advanced Elastomer Systems, grade number 3271-65W308) is particularly useful because it is resistant to soaps. - If sealing
flange 40 is ultrasonically welded tobase wall 14, low density polyethylene could be employed for sealingflange 40 and the remainder ofbellows member 30. Engage™, a LDPE from DuPont Dow Elastomers, ethylene-octene copolymer, is suitable, and is transparent, flexible and durable. - Having illustrated and described the principles of this invention in a preferred embodiment thereof, it should be readily apparent to those skilled in the art that the invention can be modified in arrangement and detail without departing from such principles. Accordingly, for an appreciation of the true scope of the invention, reference should be made to the accompanying claims.
Claims (6)
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/287,528 US7434710B2 (en) | 2005-11-23 | 2005-11-23 | Bellows pump mechanism |
AT06255442T ATE433803T1 (en) | 2005-11-23 | 2006-10-23 | BELLOWS PUMPING DEVICE |
EP06255442A EP1790416B1 (en) | 2005-11-23 | 2006-10-23 | Bellows pump mechanism |
DE602006007288T DE602006007288D1 (en) | 2005-11-23 | 2006-10-23 | Balgpumpeinrichtung |
ES06255442T ES2326995T3 (en) | 2005-11-23 | 2006-10-23 | FUELLE PUMP MECHANISMS. |
TW095139604A TW200730726A (en) | 2005-11-23 | 2006-10-26 | Bellows pump mechanism |
AU2006233203A AU2006233203B2 (en) | 2005-11-23 | 2006-10-27 | Bellows pump mechanism |
MYPI20064393A MY139914A (en) | 2005-11-23 | 2006-10-30 | Bellows pump mechanism |
SG200607501-4A SG132599A1 (en) | 2005-11-23 | 2006-10-31 | Bellows pump mechanism |
CA002567509A CA2567509A1 (en) | 2005-11-23 | 2006-11-08 | Bellows pump mechanism |
JP2006309200A JP5144057B2 (en) | 2005-11-23 | 2006-11-15 | Bellows type pump |
BRPI0604810-2A BRPI0604810A (en) | 2005-11-23 | 2006-11-17 | bellows pump |
CN2006101494663A CN1971045B (en) | 2005-11-23 | 2006-11-21 | Bellows pump mechanism |
KR1020060116333A KR101248248B1 (en) | 2005-11-23 | 2006-11-23 | Bellows pump mechanism |
HK07111536.1A HK1106174A1 (en) | 2005-11-23 | 2007-10-25 | Bellows pump mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/287,528 US7434710B2 (en) | 2005-11-23 | 2005-11-23 | Bellows pump mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070114247A1 true US20070114247A1 (en) | 2007-05-24 |
US7434710B2 US7434710B2 (en) | 2008-10-14 |
Family
ID=37635854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/287,528 Expired - Fee Related US7434710B2 (en) | 2005-11-23 | 2005-11-23 | Bellows pump mechanism |
Country Status (15)
Country | Link |
---|---|
US (1) | US7434710B2 (en) |
EP (1) | EP1790416B1 (en) |
JP (1) | JP5144057B2 (en) |
KR (1) | KR101248248B1 (en) |
CN (1) | CN1971045B (en) |
AT (1) | ATE433803T1 (en) |
AU (1) | AU2006233203B2 (en) |
BR (1) | BRPI0604810A (en) |
CA (1) | CA2567509A1 (en) |
DE (1) | DE602006007288D1 (en) |
ES (1) | ES2326995T3 (en) |
HK (1) | HK1106174A1 (en) |
MY (1) | MY139914A (en) |
SG (1) | SG132599A1 (en) |
TW (1) | TW200730726A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140079897A1 (en) * | 2012-09-14 | 2014-03-20 | Henkel Corporation | Adhesive Compositions and Use Thereof |
US20150375244A1 (en) * | 2013-02-07 | 2015-12-31 | Gb Developpement | Fluid dispensing device and method for producing such a device |
WO2017091091A1 (en) | 2015-11-25 | 2017-06-01 | Iwanejko Electronics Zdzisław Iwanejko | A dispensing device for dispensing liquids from flexible packaging for liquids |
USRE48010E1 (en) * | 2013-09-20 | 2020-05-26 | Gojo Industries, Inc. | Dispenser using electrically activated material |
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US8464917B2 (en) * | 2008-03-27 | 2013-06-18 | Vitop Moulding S.R.L. | Tap for dosing viscous liquids |
US20090304537A1 (en) * | 2008-06-06 | 2009-12-10 | Hung Kuo-Yu | Pneumatic chemical pump |
CN102448355B (en) * | 2009-03-30 | 2015-12-02 | 米德韦斯特瓦科卡尔玛荷兰有限公司 | Pump installation and the method for the manufacture of this pump installation |
US20120324734A1 (en) * | 2011-06-24 | 2012-12-27 | Andrew Anthony Szczepanowski | One piece pump with hinge |
EP2928784A4 (en) * | 2012-12-04 | 2016-11-02 | Aptargroup Inc | Fluent product dispensing package and diaphragm pump for use therein |
FR3048622B1 (en) * | 2016-03-11 | 2020-10-30 | Chanel Parfums Beaute | VIAL OF PRODUCT CONTAINING MEANS FOR PRESSURING A DISTRIBUTION PUMP |
US20220331823A1 (en) * | 2019-09-25 | 2022-10-20 | Kao Corporation | Dispenser |
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-
2006
- 2006-10-23 EP EP06255442A patent/EP1790416B1/en not_active Not-in-force
- 2006-10-23 DE DE602006007288T patent/DE602006007288D1/en active Active
- 2006-10-23 AT AT06255442T patent/ATE433803T1/en not_active IP Right Cessation
- 2006-10-23 ES ES06255442T patent/ES2326995T3/en active Active
- 2006-10-26 TW TW095139604A patent/TW200730726A/en unknown
- 2006-10-27 AU AU2006233203A patent/AU2006233203B2/en not_active Ceased
- 2006-10-30 MY MYPI20064393A patent/MY139914A/en unknown
- 2006-10-31 SG SG200607501-4A patent/SG132599A1/en unknown
- 2006-11-08 CA CA002567509A patent/CA2567509A1/en not_active Abandoned
- 2006-11-15 JP JP2006309200A patent/JP5144057B2/en not_active Expired - Fee Related
- 2006-11-17 BR BRPI0604810-2A patent/BRPI0604810A/en not_active Application Discontinuation
- 2006-11-21 CN CN2006101494663A patent/CN1971045B/en not_active Expired - Fee Related
- 2006-11-23 KR KR1020060116333A patent/KR101248248B1/en not_active IP Right Cessation
-
2007
- 2007-10-25 HK HK07111536.1A patent/HK1106174A1/en not_active IP Right Cessation
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US3987938A (en) * | 1975-09-18 | 1976-10-26 | Diamond International Corporation | Dispensing pump |
US5099885A (en) * | 1990-02-16 | 1992-03-31 | Sterisol Ab | Valve for dispensing a fluid |
US5176510A (en) * | 1990-02-16 | 1993-01-05 | Sterisol Ab | Device for dispensing fluid that includes a valve which communicates with a pump |
US5452826A (en) * | 1993-09-07 | 1995-09-26 | Asept International Ab | Portioning arrangement for dispensing portions of liquid foodstuff from a foodstuff container |
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US20140079897A1 (en) * | 2012-09-14 | 2014-03-20 | Henkel Corporation | Adhesive Compositions and Use Thereof |
US20150375244A1 (en) * | 2013-02-07 | 2015-12-31 | Gb Developpement | Fluid dispensing device and method for producing such a device |
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USRE48010E1 (en) * | 2013-09-20 | 2020-05-26 | Gojo Industries, Inc. | Dispenser using electrically activated material |
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Also Published As
Publication number | Publication date |
---|---|
AU2006233203A1 (en) | 2007-06-07 |
KR101248248B1 (en) | 2013-03-27 |
MY139914A (en) | 2009-11-30 |
TW200730726A (en) | 2007-08-16 |
HK1106174A1 (en) | 2008-03-07 |
JP5144057B2 (en) | 2013-02-13 |
EP1790416A1 (en) | 2007-05-30 |
KR20070054579A (en) | 2007-05-29 |
CA2567509A1 (en) | 2007-05-23 |
SG132599A1 (en) | 2007-06-28 |
ES2326995T3 (en) | 2009-10-22 |
EP1790416B1 (en) | 2009-06-17 |
CN1971045A (en) | 2007-05-30 |
CN1971045B (en) | 2010-06-02 |
DE602006007288D1 (en) | 2009-07-30 |
JP2007146834A (en) | 2007-06-14 |
AU2006233203B2 (en) | 2011-02-10 |
BRPI0604810A (en) | 2007-09-04 |
US7434710B2 (en) | 2008-10-14 |
ATE433803T1 (en) | 2009-07-15 |
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